Wheel-dressing tool



0. A. MILLER.

WHEEL DRESSING TOOL.

APPLICATION FILED MAY 3, I9I9.

1,387,427. 1 mallteam'. 9,1921.

v @woe/wma` l 3' f /OCJWI//em 'UNITED STATES PATENT {o1-Fica OTTO A.MILLER, F DIEYIBJOIZI?, MICHIGAN.

WHEEL-DRESSING Toor..v

Specification of Letters Batent.

Application led May 3, 1919.. Serial No. 294,462.

`new and useful Improvements in Wheel- Dressing Tools, of which thefollowing is a specification, reference being had therein to theaccompanying drawin 1 The primary object of my invention is to provide anovel wheel dressing tool that may be advantageously used for dressingthe periphery of an emery wheel, grinding or finishing wheel, so thatvthe wheel will have a concave or convex peripheryof desiredconformation for grinding or finishing pieces of work.

Another object of my invention is to provide avtool of the above classwhere positive and reliable means are employed in a manner. ashereinafter set forth for adjustably supporting a diamond mounting orother wheel dressing instrumentality so that the diamond mounting may befed into engagement with the periphery of the wheel 'for cutting ordressing a convex surface thereon or a concave groove therein, and"provision is made whereby the adjustment may be predetermined andascertained from time to time for a proper degree of dressing.

A further object of my invention is to provide a wheel dressing tool ofthe above class wherein the parts are constructed with a view ofreducing the cost of manufacture and at the same time retain thosefeatures by which safety, durability and ease of assembling aresecured.With such endsin View,

my' invention resides in the novel construction to be hereinafterconsidered and then claimed.

Reference will now be had to the drawin s wherein,

1igure 1 is a plan of the wheel dressing too Fig. 2 is a longitudinalsectional view taken on the line II-II of Fig. l;

Fi 3 is a cross sectional view taken on theline III-III of Fig. 1, and

Fig. 4 is an end view of a portion of the tool, partly broken away andpartly in section.

In the drawing, the reference numeral 1, denotes a base, which in planhas its front portion or edge semi-circular and its rear p ortion oredge rectangular or square. The sides of the base have slotted ears 2 sothat 1t maybe conveniently secured on a machine body `or adjacent anemery wheel. To further facilitate lplacing the base 1 relative tovarious types of grinding wheels, the rear portion of said base hasposts 3 4vertically disposed within the base and slidably retainedtherein b pins 4. The

posts 3 are frictionally hel posltion by set rubber 6 in the base 1against sald posts,

in adjusted or other grinding screws 5 engaging pieces of Patented Aug;9, 1921.

and the pieces of rubber 6 may be com` 'A pressed bythe set screws 5 tohold theposts raised in mactive'positions or lowered in actlvepositions, as occasion may require.

Rotatable on the base 1 and retained in engagement therewith by acentral screw 7 or other pivotal means is a guide member 8 having arearward extension 9 which together with said guide supports adovetailed tongue 10 having a longitudinal groove 11 in the greater partthereof. The rotary guide' member 8 -may be swung about the axis of thescrew or pivot 7 and the upper face of the base 1 is graduated orcalibrated, as at 12, so that the rotary guide member may be swung in anarc of a desired number of degrees. As shown in Fig. 1, the base 1 hasfour sets `of graduations or calibrations and the rotary guide member 8provided with suitable indicators whereby the operator of the tool mayaccurately move the rotary guide member `a desired number of degrees. A'f Slidable longitudinally of the tongue 10 is a conical support 13having a dependin nut 14 extending into the groove 11 o the tongue 10.In screwthreaded engagement with the nut 14 is a screw 15 within thegroove 11, and saids'crew is partv of a handle-l journaled in therearward extension 9 of the rotary guide member 8. The manner ofrotatably holding the handle 16 and the screw 15 in engagement with therotary guide member is clearly shown in Fig. 2, and it is only necessaryto rotate the handle 16 to impart a reciprocatory movement to theconical support 13 on the tongue l0 of the rotary guide member.

Detachably connected to the conical support 13 is a vertically disposedholder 17 for a laterally disposed 'diamondvmounting 18.

The holder 17 is set in the axis of the supj and said holder has avradially disto be adjusted to bind the holder in said support.

The upper end of the holder 17 is bifurcated and formed with sockets 22,either of which may accommodate the diamond mounting 18, said diamondmounting being clamped in its socket by a screw 23 transversely of theupper end of the holder 17, said screw contracting the bifurcated end ofthe holder about the diamond mounting so that it cannot becomeaccidentally displaced. When the uppermost socket 22 is used for thediamond mounting 18, the upper end of the holder may have a set screw 24to engage the diamond mounting and further hold said mounting againstdisplacement.

Longitudinal movement of the conical support 13 on the tongue 10, may beprevented by a set screw 25 carried by the support 13, said set screwengaging a pin 26 in the support that is adapted to bind again-ft thetongue 10 and prevent longitudinal 'movement of said support.

Rotary movement of the guide member 8 on the base 1 may be prevented bya set screw 27 carried by the base 1, said set screw engaging the screwor pivot 7 of the rotary guide member 8 so as to hold said screw andpivot stationary.

Fixed on the rearward extension 9 of the rotary guide member 8 is avertically disposed gage 28 that may be fixed to the rearward extension9 by screws 29 or 4 other fastening means. The ga e 28 is of a heightcorresponding to the hol er 17 and permits of a pair of calipers, amicrometer or other instrument being positioned, with the diamondmounting 18 and the gage 28 as terminals, for determining the distancethe holder 17 has been moved to and from the gage 28. Since the gage 28has a fixed and known relation tothe axis of the tool it is easy todetermine `the movement of thediamond mounting at either side of thetool axis. y

To place the tool in operation, the base 1 is positioned adjacent anemery or grinding wheel so that the axis of the holder 17 will be at atangent to the periphery of the emery wheel. Then by advancing theholder 17 toward the wheel and oscillating the handle 16 the peripheryof the wheel may be provided with a groove of desired contour. By movingthe holder 17 away from the periphery ofthe wheel and oscillating thehandle 16 the periphery of the wheel may be provided with a. convex'surface of desired contour, the contourin either instance beingdetermined by measurements between the diamond mounting 18 and the gage2 8, also by the degree of oscillation'impartedto the handle 16.

The novel adjustments of the tool permit of the periphery of a wheelbeing attacked from a desired angle so that most any desired contour maybe imparted tothe periphery of the wheel, and while in the draw ingthere is illustrated a preferred embodiment of my invention, it is to beunderstood that the structural elements are susceptible to such changein size, shape and manner of adapted for adjusting said support relativeto the tongue of said rotary guide member,

and a gage carried by said rotatable guideV member and disposed inparallelism with said holder.

2. A wheel dressing tool comprising a base, a rotatable guide memberivoted on 4 said base, means for fixing sai rotatable guide memberrelative to said base, an adjustable support on said rotatableguidemember, means adapted for fixing said support relativeto saidrotatable guide. member, a vertically disposed diamond mounting holdersupported from said support in the axis thereof, and means extending insaid rotatable guide member and engaging the lower end of said diamondmounting holder ada ted for simultaneously moving said rotatable guidemember relative to said base, and said su port and its holder relativeto said rotatable guide member.

3. A wheel dressing tool as characterizedy in claim 2 wherein therotatable guide member is provided with a gage disposed parallel to theaxis of said support.

4. A wheel dressing tool comprising a base, a rotatable guide member onsaid base, a tongue on said gui-de member provided with a groove, an ajustable support having a groove to receive the tongue o said guidemember, an adjustable vertical holder carried by said support in theaxis thereof and having its lower end extending into the oove of saidtongue, means carried by said older and engaging in saidsupport, so thatsaid holder may have a defined position relative to said support, adiamond mounting carried by said holder, and a screw in the groove ofsaid tongue engaging the lower end of said holder adapted for adjustingsaid support In testimony whereof I aix my signature and holdar relativeto the tongue of said roin the presence of two witnesses. tary ui e memer.

5. wheel dressing tool as characterized OTTO A MILLER 5 in claim 4wherein the rotatable uide mem- Witnesses: 1

ber is provided with a age isposed in ANNA M. Donn, parallelism withsaid hol er. KARL H. BUTLER.

